No, your speakers are fine. The result of these two samples playing together is silence — no sound, literally. This is what called a phase cancellation.

Typically, in the real production your sounds’ phases won’t be exactly the opposite causing silence like in the example above, but even a subtle miss-phase will cancel some frequencies out. You should keep it in mind especially when dealing with low-frequency signal such as bassline.

Watch also this excerpt from Lynda course. It demonstrates phase cancellation of an acoustic signal but the principle applies pretty much in every production:

This post is a part of the “Advice” series. I’m happy to advise on such topics as music production, sound design, performance, management, marketing, and career advice in the music industry and beyond. Send me your questions, too.